Recovery of material from aluminum reduction cell lining
First Claim
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1. A METHOD FOR THE RECOVERY OF VALUABLE FLUORIDE MATERIAL FROM USED ALUMINUM REDUCTION CELL LINING, COMPRISING HEATING THE LINING AT A TEMPERATURE IN THE RANGE OF ABOUT 1000*C. TO ABOUT 1500*C. AND UNDER PRESSURE REDUCED BELOW ATMOSPHERIC, TO VOLATILIZE FLUORIDE MATERIAL FROM THE LINING INTO VAPOR CONDENSABLE AS FLUORIDE MATERIAL OF THE CLASS CONSISTING OF CRYOLITE AND SODIUM FLUORIDE, CONDUCTING THE RESULTING VAPOR TO A CONDENSING REGION AND THERE CONDENSING FLUORIDE MATERIAL OF SAID CLASS FROM THE VAPOR.
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1 Claim
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1. A METHOD FOR THE RECOVERY OF VALUABLE FLUORIDE MATERIAL FROM USED ALUMINUM REDUCTION CELL LINING, COMPRISING HEATING THE LINING AT A TEMPERATURE IN THE RANGE OF ABOUT 1000*C. TO ABOUT 1500*C. AND UNDER PRESSURE REDUCED BELOW ATMOSPHERIC, TO VOLATILIZE FLUORIDE MATERIAL FROM THE LINING INTO VAPOR CONDENSABLE AS FLUORIDE MATERIAL OF THE CLASS CONSISTING OF CRYOLITE AND SODIUM FLUORIDE, CONDUCTING THE RESULTING VAPOR TO A CONDENSING REGION AND THERE CONDENSING FLUORIDE MATERIAL OF SAID CLASS FROM THE VAPOR.
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Current AssigneeJames P. Mcgeer, Phillips Norman W F, Vladimir V. Mirkovich
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Original AssigneeJames P. Mcgeer, Phillips Norman W F, Vladimir V. Mirkovich
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InventorsMcgeer, James P., Mirkovich, Vladimir V., PHILLIPS NORMAN W F
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Application NumberUS03/463,214Time in Patent Office1,470 DaysField of SearchUS Class Current23/294.00RCPC Class CodesC01F 7/54 Double compounds containing...
